Truck.



` LEGRAND G. CAREY.

TRUCK.

` APPLICATION FILED MAR. 26. I9I5.

Patented May 29, 1917.

2 SHEETS-SHEET l.

" Jw'et-Zg Z5 A y J3E` o @V20 JZ 14 "[30 I iff@ zz 3f WWI/$3555.' Mmm/Tof? .LE GRAND G. CAREY.

TRUCK.

APPLICATION FILED MAILZE. I9I5.

1,228,179. Patented May 29,1917.

2 SHEETS-SHEET 2.

sa I

IIA( ld!) i lInvTTED sTATEs PATENT oEEIcE.

LE GRAND G. CAREY, OF CLEVELAND, OHIO, ASSIGOR TO EDWIN D. CAREY, F BEDFORD, OHIO.

. j act description, re erence being had to the I. accompanying drawings.

; dThis invention relates to trucks particu- ,flarly adapted' for self-propelled vehicles of "type car ing hoisting mechanism, steam TRUCK.

Specification of Letters Patent. Paten ted ltIay 29,L 1917,

Application led March 26, 1915. Serial N o. 17,107. i

Referring to the drawings by reference numerals, 10 indicates longitudinal members of the truck frame connected by cross braces 11, 12, 14 and 15. 16 indicates the rotatable frame of a superstructure and 17 a portion of a boom carried by the same, being. illustrative of any suitable mechanism which may be mounted on my truck. A rear aille 18 is intermediately pivoted to a. swiivel member 20 and provided with wheels 224l at each end, whichmay be swung about /the swivel for steering the .machine bychains '.shovels,^an the like, andthe general object 23, connected with the axle and extending .lon itudinal section showlng one of the sms. er intermediate traction aprons.4

apron, secured to the aprons adjacent the ends of the flights, as described, and adapted,

f of the 'invention is to provide, a simple efiito a suitable steering mechanism not shown. 65

`1|S cient traction apron and a simple structure Intermediate of the ends of. the longitu-V coperatingv therewith for supporting and dinal members 10, is a transversely extendpropelling the vehicle. A more specific obing axle 25, carried in rigid bearings 26, Ject is to arrange the traction apron to prodepending from the frame members 10 and vide a large traction surface with mechahaving its ends extending outwardly at each 70 20 ni sm for most efficiently using this surface in side of the frame member to receive the 'supporting the truck, while allowing the wheels 27, which are rotatably mounted l traction aprons to conform to irregularities thereon. A third axle 28 adjacent the for- L- 'of the roadwa or ground. Another object Ward end of the frame is intermediately is to arrange 1 or conveniently steering and pivoted in 21 blOCk 30, Carried by the CIOSS 7`5 .25 turning the truck. Other features of my members 15, and its ends exteiid through linventlon will become apparent in the folblocks 32, which have a limited vertical .lowing description, which refers to -the movement in bearing brackets 33, depend- 'drawings, and the essential characteristics in from the frame members 10. On the are hereinafter set forth in the claims. en s of this axle are rotatably mounted 30 1 In the drawings, Figure 1 is a side eleva! 'wheels 34, corresponding to the wheels 27.

tion* of my truck showing a portion of a The wheels 27 and 34 are shown as wider superstructure forming the part of the hostthan the steering wheels 22, their inner edges Aing mechanism; Fig. 2 is a sectional plan extending inwardly substantially to the of the truck with 4the superstructure reframe members, and these wheels are adapt- 85 6 moved; Fig. 3 a vertical transverse section ed to receive the traction aprons 35.

on an enlarged scale, through the traction The traction aprons are composed of. a apron and showing the means for holding series of transverse fiights 38, each having the lower reach of the traction apron in inwardly projecting lugs 39, rigidly mount Contact with the ground, the section being ed on their inner side a distance in from the 0 taken substantially on the line 33 of Fig` ends and substantially intermediate of the 1; Fig. 4 is a vertical section through a porsides of the flights. These lugs are adapted tionof the traction apron and one of the to receive pivot pins 40 carried on upwardly Wheels over which it runs, the section being extending cars 41 of links 42,l of sprocket taken on a plane extending longitudinally chains 44. Each flight of the traction apron 95 i ofthe apron and shown on a larger scale is shown as having beaded portions 45 overthan Fig. 3 5 Fig. 5 is a plan of a portion lapping a cut-away portion 46 on the next of thetraction apron on v'the Sallie scale as adjacent flight into which it fits when the Fig. 4, and showing one of the chains formapron is drawn straight. There are prefer- 'ing a part of the same; Fig. 6 is a vertical ably two of the chains 44 for each traction 100 to run in grooves 50 in the periphery of the wheels 27 and 34. The wheels 27 are provided with rigid sprocket teeth 48 extending upwardly from the bottom of the grooves 50 the sprocket teeth 48 engaging the chains of 'unevenness of the roadway tending to push up the intermediate portion of the lower the traction a rons will cause the aprons to revolve, thereby driving the truck.

To hold the lower reach of the traction aprons intermediate of the wheels 27 and 34, in contact with the ground and thereby support a portion of the weight of the truck, I have provided two sets of wheels 55 and 56, bearing against the upper side of this lower reach and mounted in shafts 57 rigidly carried by arms 58 extending downwardly from a hub member 60. There are two sets of these wheels for each traction apron, and the hub members 60`of the frames for holding these wheels in place are pivotally mounted on the ends of a fourth axle'62, pivoted at its center in a block 64, secured to the cross members 14 of the frame. The ends of this axle are vertically slidable in bearing brackets 66 depending from the frame members 10, allowing only a slight vertical movement of each end of this axle, to compensate for reach of the traction apron.

It will be noted that the wheels 55 and 56 are so arranged on their shafts as to straddle the chains 44 and these wheels are movable about the axle, allowing one to rise slightly as the other goes down. As the lower reach of the traction apron is capable of only a limited upward movement, these wheels are preferably made as large as can be arranged between the wheels 27 and 34, and still allow a clearance providing for a slight swinging movement about the axle 62. The wheels 27 are normally driven by the axle 25, through clutch members 7 0 at each end of the axle, and slidably keyed thereto so that either clutch may engage the corresponding wheel 27 to drive it`independently of the other when it is desired to turn the machine sharply. In Fig. 2 I have shown a removable lever 72 adapted to engage a groove in the clutch member and the end of the axle for operating the clutch. These clutch members may be arranged in a manner to be controlled from a position on the truck, if desired. I

When the machine is to be used on very soft ground for example when the truck is carrying a shovel which is operating in sand or soft earth, it is necessary to provide as large supporting surface as 1s possible. Under such conditions I refer to add to the supporting surface ofp the large traction aprons already described, smaller additional traction aprons between the large traction aprons and beneath the' truck. As shown there are provided two alined sets of four wheels each, shown at 75, and arranged in action on these-wheels and accordingly there are no beads on the fiights and no sprockets in the wheels for engaging the. chains. It will be noted that the forward wheels '75 project outwardly a considerable distance past the point of contact of the wheels 34, bringing additional supporting Surface to the points where it is most neededl Having thus described my invention, what I claim 1s: e u

l. In a device of 'the character described, the combination of a truck frame, transverse axles therefor, wheels on the ends of lsaid axles, said wheels having peripheral grooves, and traction aprons running'l over said wheels and comprising a continuous series of Hights attached together by chains adapted to run in said grooves.

2. In a device of the character described the combination of a truck frame, a pair of transverse axles therefor extending 011twardly past the frame, wide wheels on the ends of the axles, each having a plurality of peripheral grooves, traction aprons adapted to run on said wheels and compris- I"ing a series of flights secured together by chains, said chains being adapted to run in Said grooves, and sprocket teeth in the wheels of one of said axles adapted to engage the chain for driving the traction apron.

3. The combination with a truck frame, of a pair of' transverse axles, traction wheels on said axles, endless traction aprons adapted to run on said wheels, .smaller wheels between the larger wheels, axles adapted to hold them in contact with the lower reach of the traction apron, and a swinging member carrying said last named axles.

4. The combination with a truck frame, of

'a pair of transverse axles, traction wheels on said axles, endless traction aprons adapted to run Aon said wheels, smaller wheels between the lar er wheels, axles therefor adapted to ho d these wheels in contact with the lower reach of the traction apron, and means carrying said last named wheels and adapted to allow a limited movement of the axis thereof.-

5. The combination with a truck frame,

ofa pair of transverse axles, weight sup-l porting wheels on the outer ends of the same, traction aprons adapted to run over lil() the alined wheels on the last mentioned axles, a transverse member between the last mentioned axles, depending frames pivoted to swing on said member, and a series of wheels carried b said frames adapted to contact with the ower reach of the traction apron to hold the same in contact with the ground. I

6. The combination with a truck frame, of a steering axle and wheels thereon, a pair of transverse axles, broad weight support- `ing traction wheels on the outer ends of the same, traction aprons adapted to run over the alined wheels on the last mentioned axles, a` transverse axle member between r the last`mentioned axles and having vertically movable ends, depending frames pivoted on its ends, and wheels adapted to contact with the lower reach of the traction apron and arranged at each side of and below the last named axle.

7. The combination with a .truck frame, of a. pair of separated transverse weight supporting axles having wheels at thelr outer ends, endless traction aprons adapted to run over alined wheels on the axles and comprising flights having an inwardly projecting flexible connection, alined smaller wheels be- Y tween the larger wheels and adapted to hold the intermedlate portions of the aprons i'n contact with the ground, and movable frames carrying said last mentioned wheels and permitting them to straddle the exible eonnections.

8.. The combination with a truck frame, of a pair of separated transverse axles having broad wheels at their outer ends outside the frame, endless traction aprons adapted to run on said wheels, wheels carried beneath the truck frame between the larger wheels and laterally separated theirom,

and a separate tractionapron adapted tog:

run thereon and contact with the ground.

9. The combination, with a truck frame, )f a pair of separated transverse axles havng broad wheels at their outer ends outside he frame, endless traction aprons adapted o run on said wheels, pairs of alined smaller vheels between said aprons, pivoted frames arrying the alined wheels, and traction .drlving the aprons, and clutch members for aprons running over said wheels and adapted to contact with the ground.

10. The combination, with a truck frame, j.

and adjacent to each of the traction aprons,

and additional traction aprons adapted to run over said rotary members.

l1. The combination, with a truck frame, transverse axles and broad wheels outside 0f the frame, of traction aprons adapted to run on sai/d broad wheels, a pair of rotary members beneath the truck frame between the tractioiaprons, ,a bracket carrying said rotary members sof'positioned that one of the rotary members projects longitudinally beyond the axle of one pair of the broad4 wheels, an alined rotary member depending beneath the truck, and a 'traction apron adapted to run over said rotary member.

12. The combination, with a truck frame, of a steering axle therefor at one end, wheels on the steering axle, a transverse axle at the other-end pivoted at the center to allow a vertical movement of the ends, means. preventing longitudinal movement of the ends, a rigid intermediate axle, broad wheels on the ends of the two last mentioned axles, traction aprons adapted to run on the last mentioned wheels, and means for holding the traction aprons in contact with the' ground between `these wheels, said last named means having a movement to allow for unevenness in the ground.

13. The combination, with a truck frame, of transverse axles and wheels therefor mounted on opposite ends of the axles, peripheral grooves in each of the wheels, traction aprons running over said wheels and comprlsing a series of .overlapping beaded flights, chains running in said grooves, and means for pivoting each of the flights to. said chains.

14. In a device of the character described,

aprons engaging the intermediate wheels for clutching the wheels of the intermediate axle with said axle independently of each other. y

15. The combination with a truck frame,

a pair of separated transverse axles, broad 1,26 s

wheels at the ends of said axles, means for i traction aprons whereby one of Said traction driven independently of the aprons may 'be other.

In testimony whereof, I hereunto affix my signature in the presence of two Witnesses.

LE GRAND G. CARE-Y.

Witnesses:

JUSTIN W. MACKLIN, ALBERT H. BATES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissie Washington, D. C.

ner of Patents, 

